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Q. A circuit contains six lamps with 60-W bulbs and a heater connected in parallel. the voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on?

Q. Jack and Jill ran up the hill at 3.4 {rm m}/{rm s}. The horizontal component of Jill's velocity vector was 2.1 {rm m}/{rm s}. What was the angle of the hill? What was the vertical component of Jill's velocity?

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